Pipe connection



Sept. 25, 1928.

, G. EGLOFF ET AL PIPE CONNECTION Filed Nov. 10 1920 Patented Sept. 25,1928.

UNITED STATES PATENT OFFICE.-

GUSTAV EGLOFF AND HARRY P. BENNER, OIE

INDEPENDENCE, KANSAS, ASSIGNORS T0 UN IVERSAL OIL PRODUCTS COMPANY, 03:CHICAGO, ILLINOS, A CORPORATION PIPE CONNECTIN.

Application filed November 10, 1920, Serial No. 423,018. Renewed March12, 1926.

This invention relates to improrements in pipe connections and refersmore particularly to return bend connections in tubes Which have beennested in banks to form heating coiis. or the like.

An1onp its salient objects are to provide a connection taking the formof a U-bend Which is easily removed and connected into a system and onethat assures a pressuretight connection when in place: to provide areturn or U-bend construction that eliminates the necessity of washers,gaskets and other appliances usually essential in making pipeconnections t-ight against high pressure; to provide a connection thatis sturdy et construction and one in Which the joining portions may beeasily cleaned of fOreign matter which would iodge in :1 position tohinder intinmte cooperation of the engaging parts, and to provide 3return bond connection that is particularly adapted for high pressuresystems and. in addition, systems where a high degree of heat is used incombination with high pressure.

Figure 1 is a side elevation of the return bend pipe connection joiningtwo pipe liries.

Fig. 2 is a sectional side view of the construction shown in Fig. 1.

Referring to the drawings, the pipe connection comprises a eonnectingtube 1 Which takes the form of 21 U or return bend having two endfianges 2 and 3. These end flanges abut upon the pipes 4 and 5 and arerecessed at 6 to receive the ends of the pipes. These circular recessesmay be ground or out so thatthey fit snugly with the pipe ends and thecon necting pipes shown at 4 and 5 should have their ends ground orsquared in a manner so that the fianges Will set ei'enly in the groovesor recesses. The fianges 2 and 3 are preferabiy welded to the tubeconnection 1 and are apertured at 7 to accommodate the offset bolts 8.These bolts 8 are uelded or otherwise rigidly fastened to the outerperipheryof the pipes -L and 5 either b spot welding or by other meanswhereby the offset bolts may serve to draw the flanges to the ends ofthe pipe orming a pressure-tight connection. The ends of these oisetbolts. which pass through the fianges. are threaded t0 accommodate thenuts 9 when the fianges have been fitted against the pipe ends so thatthe circular grooves in the fianges fit the shell et the pipes. The nutsare screwed upon the offset bolts and draw the fianges tightl agalnstthe ends of the pipes. In. t-his manner the U or return bend eliminatesthe. use of gaskets, washers or other means for making the p1peconnections pressure tight. The pipe ends, fitting snugly in the groovesin the fianges and being drawn up by means of the nuts on the ofl'setbolts, assure a. pressure-tight connection between the joining tubes.These connections are particularly adapted for use where a plurality ofpipes, such as heacing tubes, are nested together in banks and soconnected chat fluids are circulated therethrough for heat treating.

One of the particular adrantages of this construction is its simplicityand the fact that gaskets, packing and ot-her means for makingpressure-tight joints may be entirely eliminated from the system andinnumerable difiiculties relative to the common means for inakingpressure-tight connections.

WVe do not wish to restrict ourselves to this particular type of pipeconnection as the idea is adaptable to a straight pipe joint or otherpipe joint shapes.

e daim as our invention:

1. A pipe connection of the character described, comprising a connectingpipe length interposed between a pair of pipes to be united havinunfianged ends, apertured fianged ends xed to said connecting lengthbeing circularly grooved along one face thereof and adapted to receivein said grooves the pipe ends, and means comprising rigid extensionsformed integral With the pipes and having end portions spaced therefromadapted to register with the apertures in said fianges for tightlydrawing the flanges against said pipe ends to form pressure tight jointswithout the aid of packings.

2. A pipe connection of the character described comprising a connectinglength interposed between pipes to be united, apertured flanges fixed tothe ends of said length, each fiange having a circumferential circulargroove in the exposed face thereof, separated bolts rigidly connectedwith the pipes and having portions spaced therefrom adapted to passthrough the apertures in the flanges whereby,the pipe ends may betightly drawn into the grooves in said flanges of the connecting lengthto form a pressure tight connection.

3. An article of manufacture comprising a pipe section having annularlyspaced boit pipe section, the opposite end of each of said members,one.end of ea'ch of said boit memboit menabers being spaced from saidpipe bers being formed integrally with said pipe section and projectinga substantial distance section, the opposite and of each of said boltbeyond the end thereof, a joint connection, a 15 5 membersbeing spacedfrom said pipe section colla r carried by said joint connection, saidand projecting a substantial distance beyond collar being apertuied toreceive said boit the end of said pipe Section. members, and nuts forholding the pipe sec- 4. In a pipe connection, the combination tien andjoint section in assemblcd relation.

with a pipe section having annularly spaced 10 boit 1hembers, one end ofeach of said boit GUSTAV EGLOFF.

members being formed integrally With said v HARRY P. BENNER

